Due to the many complicated processes involved in auto refinishing, there might be spraying paint flaw during the time. After spraying the topcoat, sometimes it is found that the paint surface is not smooth and grainy. Why are these dirty spots wrapped in the paint film?
Cause Analysis:
1. The metal has not been cleaned throughly, there's dust, sand and other dirty things.
2. The construction environment is poor; dust, sand and other sundries are mixed into the paint, or dust falls off after painting.
3. When the paint is mixed, the air bubbles generated in the paint liquid are not dispersed before construction, especially in cold weather.
4. Improper use of thinner, poor solvency, can not completely dissolve the paint, causing particles.
5. Improper use of curing agent, incompatible with paint, causing particles.
6. The paint has not been effectively filtered before spraying.
Tips and preventative measures for dealing with paint particles after spray painting:
1. Keep the spraying environment clean.
2. Correctly seal and store the paint. Before spraying, the paint should be fully stirred and filtered before use.
3. The unevenness of the base layer should be filled with putty, then smoothed with sandpaper, wiped off the dust and then sprayed with paint.
4. Use matching thinner and curing agent.
5. If there are already dust spots, it should be polished until the surface is smooth and then repainted. Lighter dust spots should be sanded with fine sandpaper and polished.
